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Which Lug Nuts To Use on 17.5" Trailer Wheels  

Question:

I bought 17.5 steal wheels and tires for my fithwheel from E-Trailor the holes in wheel are flat can I use my original lug nuts that have a taper to them

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Expert Reply:

You can't use conical/tapered lug nuts like the # 12CLN on wheels with flat bolt seats; instead you'll want to use a lug nut with a flange like the Flange Wheel Nut - 5/8" # 95188.

If you can tell me which wheels you've got and the lug bolt size, I can confirm this is the correct part for you.

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Erik B
Phil profile picture

Phil

3/15/2025

I have bought 17.5 inch steel wheels for my fifth wheel. These are 8 lug 9/16 studs. Should I use cone style lug nuts or flat? Thanks

RobinH profile picture
Etrailer Expert

Robin H.

3/15/2025

@Phil that depends on the wheel design. I would take a look at the bolt holes and see if it looks like the cone style would fit. If it isn't obvious I would check with the manufacturer or look at the product page you ordered it from to see if it is listed.

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